PropertyCollection::IDictionary::Add Method (Object^, Object^)
Adds an element with the provided key and value to the IDictionary object.
Assembly: System.DirectoryServices (in System.DirectoryServices.dll)
Parameters
- key
-
Type:
System::Object^
The Object to use as the key of the element to add.
- value
-
Type:
System::Object^
The Object to use as the value of the element to add.
Implements
IDictionary::Add(Object^, Object^)| Exception | Condition |
|---|---|
| ArgumentNullException | key is null. |
| ArgumentException | An element with the same key already exists in the IDictionary object. |
| NotSupportedException |
You can also use the Item property to add new elements by setting the value of a key that does not exist in the dictionary (for example, myCollection["myNonexistentKey"] = myValue). However, if the specified key already exists in the dictionary, setting the Item property overwrites the old value. In contrast, the Add method does not modify existing elements.
The following example shows how to implement the Add method. This code example is part of a larger example provided for the IDictionary class.
public: virtual void Add(Object^ key, Object^ value) { // Add the new key/value pair even if this key already exists // in the dictionary. if (itemsInUse == items->Length) { throw gcnew InvalidOperationException ("The dictionary cannot hold any more items."); } items[itemsInUse++] = gcnew DictionaryEntry(key, value); }
Available since 1.1